:root {
  --bg: #ffffff;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-soft: #fbfbfd;
  --line: rgba(16, 16, 16, 0.08);
  --text: #101010;
  --muted: rgba(16, 16, 16, 0.56);
  --brand: #0059ff;
  --content-width: 1200px;
  --shadow-lg: 0 30px 90px rgba(18, 33, 72, 0.12);
  --shadow-md: 0 18px 42px rgba(20, 30, 63, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family:
    "OPPO Sans", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.page-shell {
  overflow: clip;
}

.site-header,
.hero,
.section-heading,
.cta-inner,
.site-footer-inner {
  width: min(calc(100% - 48px), var(--content-width));
  margin: 0 auto;
}

.feature-panel {
  width: min(calc(100% - 48px), 800px);
  margin-left: auto;
  margin-right: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  display: block;
  width: 160px;
  height: 28px;
  object-fit: contain;
}



.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
  margin-right: 8px;
  color: var(--muted);
  font-size: 15px;
}

.site-nav a {
  transition:
    color 180ms ease,
    transform 180ms ease;
}

.site-nav a:hover {
  color: var(--text);
  transform: translateY(-1px);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 0;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: #ffffff;
  background: linear-gradient(180deg, #1e6aff 0%, var(--brand) 100%);
  box-shadow: 0 16px 34px rgba(0, 89, 255, 0.26);
}

.button-header {
  padding: 12px 20px;
  font-size: 14px;
}

.button-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.hero {
  position: relative;
  display: grid;
  gap: 0;
  padding: 80px 0 116px;
  justify-items: center;
  text-align: center;
}

.hero-browser {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 400px;
}

.browser-shell {
  position: relative;
  width: 100%;
  height: 100%;
}

.browser-border {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center top;
}



.browser-shadow {
  display: none;
}

.browser-glow {
  display: none;
}

.browser-glow-left {
  left: -40px;
  background: rgba(92, 216, 255, 0.34);
}

.browser-glow-right {
  right: -30px;
  background: rgba(133, 115, 255, 0.18);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 840px;
  margin-top: -64px;
}

.hero-copy h1,
.section-heading h2,
.cta-section h2 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  font-size: clamp(40px, 5vw, 48px);
  line-height: 1.5;
}

.hero-copy p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.3vw, 20px);
}

.button-hero,
.button-cta {
  min-width: 180px;
  margin-top: 48px;
  padding: 16px 24px;
  font-size: 18px;
  background: #0059ff;
}
.button-hero {
  box-shadow: 0 0 0 6px rgba(0, 89, 255, 0.18);
}

.hero-note {
  display: block;
  margin-top: 18px;
  color: rgba(16, 16, 16, 0.6);
  font-size: 14px;
  letter-spacing: 0.02em;
}

.section-heading {
  max-width: 760px;
  padding-top:70px;
  padding-bottom: 32px;
  text-align: center;
}

.section-heading h2,
.cta-section h2 {
  font-size: clamp(32px, 4vw, 40px);
  line-height: 1.4;
}

.section-heading p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 24px);
  line-height: 1.6;
}

.feature-panel {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 400px;
  margin-bottom: 120px;
  padding: 0 60px;
  overflow: hidden;
  border-radius: 24px;
  box-shadow: var(--shadow-md);
}

.feature-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
  pointer-events: none;
}

.panel-copy {
  position: relative;
  z-index: 1;
  max-width: 276px;
}

.panel-copy h3 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(34px, 4vw, 40px);
  line-height: 1.4;
  letter-spacing: -0.04em;
}

.panel-visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 322px;
  width: 322px;
  min-height: 260px;
}

.panel-visual-image {
  width: min(100%, 300px);
  height: auto;
  max-height: 300px;
  object-fit: contain;
}

.panel-security {
  background:
    radial-gradient(
      circle at 78% 42%,
      rgba(145, 200, 255, 0.28),
      transparent 24%
    ),
    linear-gradient(180deg, #4e8dff 0%, #0059ff 100%);
}

.security-visual {
  min-height: 300px;
}



.panel-focus {
  background: linear-gradient(180deg, #24c7f2 0%, #00b5d7 100%);
}




.panel-bookmarks {
  background: linear-gradient(168deg, #ffd739 8%, #ff9b17 58%);
}

.bookmarks-visual {
  min-height: 280px;
}



.capability-section {
  width: 100%;
  padding: 80px 0 124px;
  background: #fafafa;
}

.capability-section .section-heading {
  width: min(calc(100% - 48px), 760px);
}

.capability-carousel {
  width: min(calc(100% - 48px), var(--content-width));
  margin: 0 auto;
}

.capability-viewport {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.capability-viewport::-webkit-scrollbar {
  display: none;
}

.capability-grid {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 384px;
  gap: 24px;
  width: max-content;
  margin: 0;
}

.capability-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  width: min(calc(100% - 48px), var(--content-width));
  margin: 56px auto 0;
}

.capability-control {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
  color: #101010;
  cursor: pointer;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    background-color 180ms ease;
}

.capability-control:hover:not(:disabled) {
  transform: translateY(-1px);
}

.capability-control:disabled {
  background: rgba(255, 255, 255, 0.48);
  color: rgba(16, 16, 16, 0.28);
  cursor: default;
}

.capability-control-icon {
  width: 14px;
  height: 14px;
  border-top: 4px solid currentColor;
  border-right: 4px solid currentColor;
}

.capability-control-icon-prev {
  transform: rotate(-135deg);
  margin-left: 4px;
}

.capability-control-icon-next {
  transform: rotate(45deg);
  margin-right: 4px;
}

.capability-card {
  padding: 38px;
  border: 1px solid #f3f3f3;
  border-radius: 24px;
  background: #ffffff;
  box-shadow: none;
}



.capability-card h3 {
  margin: 22px 0 10px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.capability-card p {
  margin: 0;
  color: rgba(16, 16, 16, 0.62);
  font-size: 16px;
  line-height: 1.7;
}

.cta-section {
  position: relative;
  width: 100%;
  margin-top: 0;
  padding: 60px 0 161px;
  background: #fafafa url("../images/s4_bg.svg") center bottom / cover no-repeat;
  text-align: center;
}

.cta-inner {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  position: relative;
  z-index: 1;
}



.site-footer {
  width: 100%;
  background: #ffffff;
}

.site-footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding: 40px 0 41px;
}

.footer-meta {
  text-align: right;
  color: rgba(16, 16, 16, 0.58);
  font-size: 13px;
  line-height: 1.8;
}

.footer-meta .icp-info {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  color: #666;
}
.copyright {
  color: #666;
  margin-bottom: 0;
}
.icp-info a {
  color: #666;
  display: flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  transition: color 0.2s;
}
.divider {
  color: #ddd;
  margin: 0 5px;
}
.footer-meta .icp-info img {
  width: 12px;
  height: 12px;
  object-fit: contain;
}

.footer-meta p {
  margin: 0;
}

@media (max-width: 1100px) {
  .site-nav {
    display: none;
  }

  .feature-panel {
    min-height: unset;
    padding: 48px 32px;
  }


  .capability-grid {
    grid-auto-columns: minmax(300px, calc(50vw - 32px));
  }

  .capability-controls {
    margin-top: 44px;
  }

  .site-footer-inner {
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }
}

@media (max-width: 768px) {
  .site-header,
  .hero,
  .section-heading,
  .feature-panel,
  .cta-inner,
  .site-footer-inner,
  .capability-carousel,
  .capability-controls {
    width: min(calc(100% - 32px), var(--content-width));
  }

  .site-header {
    padding: 14px 0;
  }

  .brand-logo {
    width: 146px;
    height: auto;
  }

  .button-header {
    padding: 11px 16px;
    font-size: 13px;
  }

  .hero {
    padding-top: 20px;
    padding-bottom: 112px;
  }

  .hero-browser {
    height: 340px;
  }

  .browser-border {
    object-fit: cover;
    object-position: center top;
  }



  .hero-copy h1 {
    line-height: 1.34;
  }

  .hero-copy {
    margin-top: -44px;
  }

  .button-hero,
  .button-cta {
    min-width: 158px;
    padding: 16px 24px;
    font-size: 16px;
  }

  .button-icon {
    width: 18px;
    height: 18px;
  }

  .section-heading {
    padding-bottom: 24px;
  }

  .feature-panel {
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 104px;
    padding: 40px 28px;
    border-radius: 22px;
  }

  .panel-copy {
    max-width: none;
    margin-bottom: 24px;
  }

  .panel-copy h3 {
    font-size: 30px;
    line-height: 1.3;
  }

  .panel-visual {
    flex: 0 0 auto;
    width: 100%;
    min-height: 240px;
  }

  .focus-visual {
    margin-right: 0;
    justify-content: center;
  }





  .capability-section {
    padding: 72px 0 60px;
  }

  .capability-grid {
    grid-auto-columns: calc(100vw - 64px);
  }

  .capability-controls {
    margin-top: 36px;
  }

  .capability-card {
    padding: 30px 24px;
  }

  .cta-section {
    padding: 60px 0 116px;
  }

  .site-footer-inner {
    padding: 34px 0 36px;
  }
}

@media (max-width: 520px) {
  .site-header,
  .hero,
  .section-heading,
  .feature-panel,
  .cta-inner,
  .site-footer-inner,
  .capability-controls {
    width: min(calc(100% - 24px), var(--content-width));
  }

  .capability-carousel{
    width: 100%;
    margin-left: 12px;
    padding-right: 12px;
  }

  .site-header {
    gap: 12px;
  }



  .brand-logo {
    width: 132px;
  }

  .button-header {
    padding: 10px 14px;
  }

  .hero-copy h1 {
    font-size: 34px;
  }

  .hero-copy p {
    font-size: 16px;
  }

  .hero-note {
    font-size: 12px;
  }

  .section-heading h2,
  .cta-section h2 {
    font-size: 28px;
  }

  .section-heading p {
    font-size: 15px;
  }

  .feature-panel {
    gap: 26px;
    padding: 36px 20px;
  }
  .panel-copy h3 {
    font-size: 26px;
  }



  .site-footer-inner {
    padding-top: 34px;
  }
}